Valve-gear for gas-engines.



No. 718,064. Y PATENTBD JAN. 6. 1903.

.J. o. WHITE.

VALVE GEAR POR GASVENGINES.

APPLICATION FILED MAB.. 26, 1902.

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UNITED STATES PATENT OFFICE.

JOHN C. WHITE, OF DEOATUR, ILLINOIS, ASSIGNOR TO WILLIAM L. OAKES,

OF DEOATUR, ILLINOIS.

VVALVE-GEAR' FOR GAS-ENGINES.

SPECIFICATION forming part of Letters Patent No. 718,064, dated January6, 1903.

Application filed March 26, 1902.

To @ZZ whom t may concern,.-

Be it known that I, JOHN O. WHITE, of the city of Decatur, county ofMacon, and State of Illinois, have invented a certain new and usefulValve-Gear for Gas-Engines, of which the following is a specification.

The object of this invention is to provide improved and simplified meansfor positively controlling and operating the valves of gasengines bymeans of a single lever.

The invention is exempliied in the structure hereinafter described, andit is delined in the appended claims.

In the drawings forming part of this specication, Figure 1 is a sectionthrough an end of the cylinder of a gas-engine, the section plane beinghorizontal and both valves being shown closed. Fig. 2 is a sectionsimilar to that shown in Fig. 1, the inlet-valve being shown open andthe outlet-valve closed. Fig. 3 is the same as Fig. 2, except that inthe latter figure the outlet is open andthe inlet closed.

A fragment of a cylinder is shown at 1, an exhaust-chamber at 2, and aninlet-chamber. at 3. The exhaust-Valve is shown at 4: and theinlet-valve at 5. An outlet for the exhaustchamber is shown at 6, and asupply for the inlet-chamber is shown at 7. The stem 8 of theexhaust-valve extends through the outlet-chamber 2 and has slidingbearingsin the outer head of the cylinder. The stem 9 of inlet-valve 5extends through the inlet-chamber 3, and it also has bearings in theouter head of the cylinder. Valve-stem 8 has a forked head 10 on itsouter end, and valvestem 9 has a similar head ll on its outer end. Alever 12 is pivoted between its ends on a. pin 15 in the forked head 11of valve-stem 9, and one of its ends is slotted, as shown at 13, toengage a pin in head 10 of valve-stem 8. A valve-actuating rod 18 has aforked end 17, that connects pivotally with lever 12 through pin 16. Alateral extension 20 from the cylinder-casing straddles theVvalve-actuating rod 18. A collar 19 is secured to the rod back ofextension 20, and a spring 2 1 encircles the rod between the extensionand the collar. A

spring 22 encircles the boss that forms the bearing for valve-stem 9,andit tends to hold the valve closed by `exerting pressure out- Serial Nol100,133. (No model.)

ward from the cylinder-head and against a collar in the outer end of thestem. Spring 23 tends to hold valve V4 closed by pressing outwardagainst a collar on the outer end of stem 8. g

In a four-stroke cycle-engine valve 5 is held open for the admission ofthe charge during one stroke of the engine. Bot-h valves are closed, asshown in Fig. 1, during a compression and subsequent explosion of acharge in the cylinder, which occupies two `strokes of the engine, andthe exhaust-valve is held open, as shown in Fig. 3, during the otherstroke.

While the lever 12 is opening one valve it uses the other vavle as afulcrum. It is alever of the rst class While opening and closing theexhaust-Valve. It is a lever of the second class while opening andclosing the inletvalve, and when the reciprocating movements of the rod18 are uniform in extent the exhaust-valve is opened much wider thantheinlet-valve.

' The springs 22 and 23 are desirable, for the reason that they hold thevalves seated and prevent dancing thereof. They are desirable but notindispensable elements. Of the two springs, 23 is the mostimportant, forthe reason that the stem of the exhaust-valve is more likely to becomeheated and stick in its bearings than is the stem of the inlet-valve.

The spring 2l is intended to move the actuated rod 18 in one directionwhen such rod is thrown positively in one direction only. When the rodis moved positivelyin both directions, the spring 21 is not needed.

1. In a valve-gearing for engines, the combination of an inlet-valve, anexhaust-valve, a lever pivoted only to said valves, to one Valve at apoint between its ends and to the other valve at one end, and actuatingmeans applied to the other end of the lever.

2. In a valve-gearing for engines, the combinatiou of an inlet-valve, anexhaustvalve, a lever pivoted only to said valves, at one end with theexhaust-valve and between its ends with the inlet-valve, andvalveactuating means applied to the other end of the lever.

3.l In a valve-gearing for engines, the combination of an inlet-valve,an exhaust-valve,

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a lever pivoted only to said Valves, at one end With the inlet-Valve,Valve-actuating means With the stem of the exhaust-valve and beappliedto the other end of the lever, and

tween its ends with the stem of the inletsprings tending to hold thevalves closed.

valve, Valve-actuating means applied to the In testimony whereof I signmy name in the 5 other end of the lever, and a spring tending presenceof two subscribing Witnesses.

to hold the exhaust-valve closed. i

4. In a valve-gear for engines, the combi- JOHN C' WHITE nation of aninlet-valve, an exhaust-Valve, a l Witnesses:

lever pivoted only to said valves, at one end WM. L. OAKES, 1o with theexhaust-valve and between its ends GEO. R. QAKES.

